package com.sdcx.agrobank.util;

import android.text.TextUtils;
import android.util.Log;

import androidx.annotation.NonNull;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class CmdUtil {
    private static final String TAG = "CmdUtil";

    private static final String COMMAND_SH = "sh";
    private static final String COMMAND_EXIT = "exit\n";
    private static final String COMMAND_LINE_END = "\n";


    /**
     * 运行命令
     *
     * @param command 命令
     * @return 结果
     */
    public static Result execute(String command) {
        Log.i(TAG, "execute() command = " + command);
        Result result = new Result();

        if (TextUtils.isEmpty(command)) {
            Log.w(TAG, "WARNING: command should not be null or empty");
            return result;
        }

        Process process = null;
        DataOutputStream dos = null;

        try {
            process = Runtime.getRuntime().exec(COMMAND_SH);
            dos = new DataOutputStream(process.getOutputStream());
            dos.write(command.trim().getBytes());
            dos.writeBytes(COMMAND_LINE_END);
            dos.flush();
            dos.writeBytes(COMMAND_EXIT);
            dos.flush();
            result.code = process.waitFor();
            result.success = readBuffer(new BufferedReader(new InputStreamReader(process.getInputStream())));
            result.error = readBuffer(new BufferedReader(new InputStreamReader(process.getErrorStream())));
            Log.i(TAG, "result = " + result);
        } catch (IOException ioe) {
            ioe.printStackTrace();
            Log.e(TAG, ioe.getMessage());
        } catch (InterruptedException ie) {
            ie.printStackTrace();
            Log.e(TAG, ie.getMessage());
        } finally {
            try {
                if (null != dos) {
                    dos.close();
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
                Log.e(TAG, ioe.getMessage());
            }
            if (null != process) {
                process.destroy();
            }
        }
        return result;
    }

    @NonNull
    private static String readBuffer(BufferedReader bufferedReader) throws IOException {
        StringBuilder sb = new StringBuilder();
        String s;
        while ((s = bufferedReader.readLine()) != null) {
            sb.append(s);
        }
        return sb.toString();
    }


    /**
     * Command执行结果
     */
    public static final class Result {

        public static final int SUCCESS = 0;
        public static final int ERROR = -1;

        public int code = ERROR;
        String error;
        String success;

        @Override
        public String toString() {
            return "Result{" +
                    "code=" + code +
                    ", error='" + error + '\'' +
                    ", success='" + success + '\'' +
                    '}';
        }
    }
}
